How many rows of piles are generally set up in freestyle skating competition? How many piles per row? A: row 5 and 25 B: rows 2 and 18 C: rows 1 and 30 D: rows 3 and 20

<frameset rows=#>表示

If a is known to be a 2×3 matrix, then after executing a=a(:), ( ). A: a transforms to a column vector B: a transforms to 3 rows and 2 columns C: a transforms to 3 rows and 3 columns D: a transforms to 2 rows 3 and columns

rows是用来指定（）

<table rules=rows>,表示（ )。

假设数据集中“数量”是第5个字段,下面()能得到第3条记录的数量。 A: Ds.Tables[0].Rows[3][4].ToString B: Ds.Tables[0].Rows[2][4].ToString C: Ds.Tables[0].Rows[2][5].ToString D: Ds.Tables[0].Rows[3][5].ToString

If it is known that A is a 3×5 matrix, after executing A(:,1:2:3)=&#91;&#93;, ( ). A: A becomes row vector B: A becomes 3 rows and 3 columns C: A becomes 3 rows and 2 columns D: A becomes 2 rows and 3 columns

下列选项中，能填入空白处3的代码是() A: cols != ma.cols B: rows != ma.cols C: rows != ma.rows D: cols != ma.rows

中国大学MOOC:"The seating style of traditional rows ________.";

People_______ on this lake. A: row B: rows C: rowing